"I fell in love with her when she was on Star Trek, when she was 17 or something. She's just amazing," Poirier told Collider. "She has so much soul to her. Honestly, she was our first choice.

"I know every creator says that about their lead, but it's absolutely true. She was the prototype for this role. It's a number of things. She has an ability to show a depth of character, but also a vulnerability, and she can show her pain. At the same time, she can kick ass.

"She gave me the luxury of being able to write a really complex character because she can go so many different places."